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Finding the Fourth Proportional to 13,375.20, 20,062.80 and 13,144.80

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Solution

The fourth proportional to 13,375.20, 20,062.80 and 13,144.80 is: 19,717.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,375.20 : 20,062.80 = 13,144.80 : x
  2. Step 2: Convert to fraction form
    13,375.20/20,062.80 = 13,144.80/x
  3. Step 3: Cross multiply
    13,375.20x = 20,062.80 × 13,144.80
  4. Step 4: Simplify right side
    13,375.20x = 263,721,493.44
  5. Step 5: Solve for x
    x = 263,721,493.44/13,375.20
  6. Step 6: Final answer
    x = 19,717.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.